Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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Distance from geostationary orbit to the moon
- dakota224
- · Replies 17 ·
Radioactive decays - given power value
- mahoteacher
- · Replies 5 ·
Calc Vol of 1 Mol Steam @ 100°C, 1 atm: Ideal Gas Eqn
- max1995
- · Replies 3 ·
Calculate total mechanical energy of a frictionless spring
- henrco
- · Replies 5 ·
Finding acceleration from distance and time
- ajd2000
- · Replies 2 ·
Comparing horizontal ranges at 45° and 30° angles
- Yoruichi
- · Replies 3 ·
Energy and charged particle collisions
- krbs
- · Replies 4 ·
Archived Calculating Back EMF of an Automobile Starter Motor
- Augustus
- · Replies 1 ·
Finding original frequency of tuning fork B from beat frequency data
- SpicyWassabi101
- · Replies 6 ·
Archived Finding effective capacitance between two points in a circuit
- nishantve1
- · Replies 7 ·
How Long Will It Take to Travel 65 Light-Years at Relativistic Speeds?
- persephoneia
- · Replies 3 ·
Magnitude of electric field/Need answer checked
- WestTXcollegekid
- · Replies 1 ·
Archived Projectile motion: finding displacement and velocity angle, and comparing ranges
- shaunamariexx
- · Replies 2 ·
Closest approach of protons at T = 10^7 K
- PAK108
- · Replies 13 ·
Difference between stationary/non-stationary quantum states
- acdurbin953
- · Replies 6 ·
Block off inclined plane (kinematics + projectile motion?)
- muhammed_oli
- · Replies 8 ·
Calculating number of free electrons in metals
- eforma
- · Replies 5 ·
Why do two vector addition methods give different answers for airplane ground velocity?
- physics4ever25
- · Replies 72 ·
Direct integration of spring-mass energy equation for x(t)
- jin94
- · Replies 4 ·
Slipping Ladder Angular Acceleration
- SoNiiC
- · Replies 5 ·
What is the acceleration of a falling object from a balloon?
- Eclair_de_XII
- · Replies 32 ·
Changing wavelength with changing tension
- Mr Davis 97
- · Replies 1 ·
Finding time when you have initial velocity and position
- oliampian
- · Replies 1 ·
Max Collector Current in Transistor Circuits
- Marcin H
- · Replies 3 ·
Child on rotating merry-go-round: acceleration, friction, coefficient
- mutecity44
- · Replies 1 ·
Calculating Momentum and Mass after a Collision
- hatekhaos
- · Replies 3 ·
2D Relative Velocity regarding boats
- in the rye
- · Replies 6 ·
Find the current through the inductor
- Potatochip911
- · Replies 19 ·
How Does a Proton Behave in a Magnetic Field?
- Jeremy Higgins
- · Replies 16 ·
How to find deceleration to stop collision with moving body?
- Eclair_de_XII
- · Replies 6 ·
Rotational Motion of a baseball
- manuel60
- · Replies 4 ·
Electric Dipole Energy Outside Sphere
- Jake 7174
- · Replies 11 ·
Expectation Value of Hamiltonian with Superposition
- BOAS
- · Replies 18 ·
What is the Intensity of Light 12m from a Bulb Shining in All Directions?
- Rumplestiltskin
- · Replies 2 ·
What is the relationship between resistors in a circuit?
- Matt O
- · Replies 15 ·
How Far Does a Hamster Run in Its Wheel in One Night?
- katie beisel
- · Replies 5 ·
Friction on an incline and velocity
- df102015
- · Replies 3 ·
Angular acceleration, tangential acceleration
- katie beisel
- · Replies 6 ·
Calculating Final Velocity Using Force-Displacement Graph
- df102015
- · Replies 12 ·
Calculating Expected Values for 3D Harmonic Oscillator Wave Function
- Incand
- · Replies 6 ·
Verify Ψ is solution of quantum oscillator using H operator
- ElectricEel1
- · Replies 8 ·
Velocity of propagation of an EM field in vacuum
- It's me
- · Replies 2 ·
What Determines the Coefficient of Restitution in a Two-Object Collision?
- Yoruichi
- · Replies 10 ·
How to Understand Position Uncertainty in Quantum Mechanics?
- ognik
- · Replies 6 ·
How to determine the sign of currents in complex circuits?
- KShah423
- · Replies 6 ·
Gauss's Law and Electric Field Question.
- sanhuy
- · Replies 10 ·
Calculate Free Fall Time for 10.0m w/ g=1/6 Earth's g
- Balsam
- · Replies 10 ·
How Do You Calculate the Electric Field at the Origin with Three Charges?
- StrSpeed
- · Replies 1 ·
How fast to spin object hanging by thread to break thread
- Nikki1357
- · Replies 3 ·
Simple Energy Question based on SHM
- RJLiberator
- · Replies 2 ·
Friction, centripetal force, gravity, and velocity
- katie beisel
- · Replies 1 ·
Projectile motion motorcycle question
- kelvin56484984
- · Replies 13 ·
Proton speed and kinetic energy after acceleration over 3.1 cm
- GalacticSnipes
- · Replies 4 ·
Magnitude of static friction force
- pinkpistachios
- · Replies 7 ·
How Much Power is Needed to Move an Elevator at 4.50 m/s?
- GalacticSnipes
- · Replies 11 ·
Two football players running toward each other collision time
- Balsam
- · Replies 25 ·
Force required to negate vertical acceleration with friction
- Obliv
- · Replies 5 ·
Find the frequency of the cylinder's vertical vibration
- CGI
- · Replies 10 ·
Solving a Collar's Angular Momentum Problem: Finding f(θ) and Max θ Reached
- harmyder
- · Replies 10 ·
How to find the distance between two decelerating trains?
- Eclair_de_XII
- · Replies 7 ·
Calculating Minimal Distance between Two Protons in Motion
- kuokius
- · Replies 12 ·
Charge Distribution on Metal Plate: How to Find Surface Charge Density?
- kuokius
- · Replies 3 ·
Why Does the Solution Use (T2 - T1) * R for Net Torque?
- RoboNerd
- · Replies 2 ·
Projectile Motion calculation problem
- x2017
- · Replies 13 ·
What is the gravitational potential energy of the box relative to the floor?
- nicolehoskins
- · Replies 4 ·
Electrostatics and nuclear force problem
- hawkeye1029
- · Replies 7 ·
Mass hangs in equilibrium on a spring (oscillation)(MCQ)
- slymme
- · Replies 5 ·
Pendulum problem using Lagrangian
- Andy123
- · Replies 20 ·
How Does Fluid Viscosity Affect Spring Oscillation Period?
- SirR3D
- · Replies 6 ·
Kinetic Energy of neutron and electron
- Dexter Neutron
- · Replies 2 ·
College physics problem -- Find gravitational acceleration
- Brij Patel
- · Replies 12 ·
How to derive the equation with velocity and acceleration?
- Eclair_de_XII
- · Replies 5 ·
Find the time for the string to break
- TheSwedeAtLarge
- · Replies 3 ·
Finding Your Way Home: Vector Components and Trigonometry
- j doe
- · Replies 2 ·
Initial speed of football clearing a 10 ft goal post bar
- md3v
- · Replies 2 ·
Celsius to Kelvin conversion problem (Kinetic theory)
- Forco
- · Replies 2 ·
Gaussian surface (infinitely long cylindrical conductor)
- Kaleem
- · Replies 8 ·
Blocking capacitor value requirement in common emitter amplifier
- Harrison G
- · Replies 6 ·
Concrete Block Incline acceleration question
- nwmyname
- · Replies 4 ·
How Do Charges and Voltages Distribute in a Circuit with Multiple Capacitors?
- vizakenjack
- · Replies 16 ·
Relativistic velocity addition with car and baseball
- cosmos42
- · Replies 4 ·
Can't understand 2 pulley 3 masses problem
- TissueCulture
- · Replies 14 ·
Phase difference after passing through liquid and glass
- magnesium12
- · Replies 2 ·
What is the path of a ball thrown between two children in a moving car?
- cosmos42
- · Replies 5 ·
Archived Efficiency Calculation of 10-kVA Transformer at 0.85 Power Factor Lagging
- graygoh
- · Replies 1 ·
Solving for Air Speed in an Air Duct
- TooDank4U
- · Replies 1 ·
Calculating Relativistic Energy and Momentum of a Proton
- cosmos42
- · Replies 1 ·
Irreversible adiabatic process - is the entropy change zero?
- Ortanul
- · Replies 1 ·
Finding river width from boat crossing times with current
- jasonchiang97
- · Replies 8 ·
EPE and particle collision (grade 12)
- krbs
- · Replies 7 ·
Finding temperature coefficient of resistivity of the alloy
- Searay330
- · Replies 17 ·
Determine the number of particles transmitted by S-G analyzer
- acdurbin953
- · Replies 5 ·
Time in air for gold ball projectile at 52 m/s and 50 degrees
- Krookwood
- · Replies 10 ·
Finding the Mass of a Helicopter
- dydxx
- · Replies 1 ·
Local Sidereal Time, RA of a star
- bunchedupwalrus
- · Replies 2 ·
Gravitational Fields - Spacecraft approaching planet
- Physics Dad
- · Replies 18 ·
How to Calculate Energy and Work in a Stirling Cycle?
- mathpialpha
- · Replies 3 ·
Deriving the Formula for 2D Motion with Constant Acceleration
- kelvin56484984
- · Replies 5 ·
What is the Conversion Rate from Curie to Becquerel?
- Drizzy
- · Replies 8 ·
Why does a charged Styrofoam plate attract paper but repel aluminum foil?
- cvc121
- · Replies 7 ·